_____is the amount of work done is carrying a charge of 4C across two points having a potential difference of 18 volts:
a)7.2 J
b)72J
c)4.5 J
d)24J
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Answer:
72J
Explanation:
work done = amount of charge * potential difference between them
hence , w= q*v
q=4c , v = 18v
=> 4*18 = 72 J
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